CA1202393A - Method for connecting branch circuits to cores of a live electrical cable, including branch terminal for achieving said method - Google Patents
Method for connecting branch circuits to cores of a live electrical cable, including branch terminal for achieving said methodInfo
- Publication number
- CA1202393A CA1202393A CA000429727A CA429727A CA1202393A CA 1202393 A CA1202393 A CA 1202393A CA 000429727 A CA000429727 A CA 000429727A CA 429727 A CA429727 A CA 429727A CA 1202393 A CA1202393 A CA 1202393A
- Authority
- CA
- Canada
- Prior art keywords
- contact
- cores
- cable
- contact piece
- branch circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
- H01R9/031—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for multiphase cables, e.g. with contact members penetrating insulation of a plurality of conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
Abstract
ABSTRACT OF THE DISCLOSURE
This method for connecting branch circuits to cores of a live electrical cable provides that the contact pieces are individually placed in position, separated by a clamping ring in a common predetermined cable cross section plane, whereby the branch circuits are connected to the contact pieces before or afterward. The clamping ring is then changed into a position which encloses the contact pieces and during tightening of the terminals the cable cores are pressed against the contact pieces which touch the cable cores, whereby the blades or similar devices of the contact pieces penetrate the core insulation and physical contact with the cable is established. The branch terminal in this instance consists of separate contact pieces with contact feet, which have contact blades or similar arrangements, which can be inserted into a dual trough-like spacer piece placed between the cable cores. The two-piece clamping ring envelops the set of contact pieces and exerts pressure via pressure pieces on the cable cores during the process of tightening the tension bolts, with the cable cores consequently being pressed against the contact blades of the contact feet.
This method for connecting branch circuits to cores of a live electrical cable provides that the contact pieces are individually placed in position, separated by a clamping ring in a common predetermined cable cross section plane, whereby the branch circuits are connected to the contact pieces before or afterward. The clamping ring is then changed into a position which encloses the contact pieces and during tightening of the terminals the cable cores are pressed against the contact pieces which touch the cable cores, whereby the blades or similar devices of the contact pieces penetrate the core insulation and physical contact with the cable is established. The branch terminal in this instance consists of separate contact pieces with contact feet, which have contact blades or similar arrangements, which can be inserted into a dual trough-like spacer piece placed between the cable cores. The two-piece clamping ring envelops the set of contact pieces and exerts pressure via pressure pieces on the cable cores during the process of tightening the tension bolts, with the cable cores consequently being pressed against the contact blades of the contact feet.
Description
3~3~
METHO~ FOR CONNECTING BRANCH CIRCUITS TO CORES
OF A LIVE ELECTRICAL CABLE, INCLUDING B~ANCH
TERMINAL FOR ACHIEVING SAID METHOD
The invention concerns a method for connecting branch circuits to cores of a live electrical cable, including branch terminal for achieving said method, with the charact-eristics pursuant to Clalms 1 and 3.
From the previously known German Patent No. DE-GM
1 855 753 there is already known a branch terminal for ground cable, which exhibits two semicircular-shaped insulation bodies into which are implanted, in their interiors, contact pieces with lugs having a conical or pyramid shape. The insulation parts are pressed together by means of a tension band, which extends in a circumferential groove of the insulation parts.
It is disadvantageous that the connection of the branch terminals is not possible at the individual contact pieces, separated from the insulation bodies, whereby because of the required bending and insertion of branch conductors into the openings of the contact pieces, the connection of the branch circuits becomes more difficult. In addition, the exertion of pressure upon the contact pieces and the pressing of the contact piece protrusions into the cable cores requires massive upper and lower partsl thus resulting in an unnecessary manufacturing cost. Finally, the pressing of the radial A 25 contact piece protrusions during the process of pressing together the two-part insulation body is not eEficient.
3~3 From the prepublication Version of German DE-PS
1 765 2~2 it is furthermore known that a branch terminal must be provided with a two-part clamping body whose parts are kept flexible with respect to each other and which can be pressed together by means of bolts. The clamping body parts accept the contact pieces firmly. They thus transmit to the contact pieces the pressure generated as a resuit of the screwing operation and press the blades of the contact pieces, which extend in the direction of the approaching clamp body parts, into the cable cores. It is also disadvantageous for this known branch terminal that the connection of the branch conductors is only possible at the con-tact pieces which are located within the clamp body, which makes the connection of the branch conductor more difficult.
Moreover, the clamp body in this instance, due to the transfer of pressure on the contact pieces, must also consist of compact parts which are expensive to produce.
The invention is ~ased on the objective of facilitating the connection of branch conductors to the contact pieces and simplifying the productiontmanufacture of the ciamp body.
The invention offers the advan-tage of making it possible to connect the branch conductors, e~en singly, to the spatially separated contact pieces of the branch terminal.
The installation process is thereby simplified considerably. Moreover, i-t is possible to use a relatively simple body for pressing together the cable cores and thus for compressing the contact blades or similar elements of the contact pieces into the cable cores.
The clamping ring, which exerts pressure only upon the cable cores, can be made from a metallic part, preferably a pressed metal ring, which is bent into a U-shaped element.
According to a broad aspect of the in~ention there is provided a method for electrically connecting at least one branch circuit to a li~e electrical cable having a plurality of cores, comprising spreading apart the plurality of cores of the cable to form an open area between the cores~ inserting 12g:~3~3~
contact means in the open area between the plurality of cores, connecting the at least one branch circuit to the contact means, encircling the plurality of cores and the contact means with clamping means, and tightening the clamping means to press the plurality of cores against the contact means thereby connecting the at least one branch circuit to at least one of the plurality of cores o~ the cable.
According to a further broad aspect of the invention there is provided an appara-tus for electrically connecting at least one branch circuit to an electrical cable having a plurality of cable cores, comprising at least one contact piece having a foot-shaped extension which is insertable between at least first and second cable cores-and with a branch circuit lead being connected to said at least one contact piece, and clamping means selectively clampable around the electrical cable and the at least one contact piece and includin~ means for bringing the at least one contact piece with the at least one branch circuit into electrical contact with the cable.
According to a stili further broad aspect of the invention there is provided a branch terminal for electrically connecting at least one branch circuit to an electrical cable having a plurality of cable cores wherein each core is surrounded by insulation, comprising a spacer body which spaces at least first and second cable cores apart from each other, at least one contact piece having a block-shaped contact piece body and a foot-shaped extension perpendicular thereto, said contact piece body including connecting means for connecting the at least one branch circuit to the contact piece and said extension including a knife blade contact portion, and a clamping ring having two generally semi-circular halves wherein the clamping ring is selectively clampable circumferentially of the pluraiity of cable cores ~ and around the contact piece and the spacer body, said '`~5 clamping ring including means for adjusting the relative spacing between said halves for urging the knife blade 3~;3 contact portion of the contact piece to cut through the insulation of at least one of the plurality o~ cable cores thereby electrically connecting the branch circuit with the electrical cable.
The invention is explained in greater detail by refer-ence to drawings in which:
Figure 1 illustrates a front view, partially sectioned, of the branch terminal according to the invention; and Figure 2 shows a side view.
As an example, the main cable 1 shows four cable cores
METHO~ FOR CONNECTING BRANCH CIRCUITS TO CORES
OF A LIVE ELECTRICAL CABLE, INCLUDING B~ANCH
TERMINAL FOR ACHIEVING SAID METHOD
The invention concerns a method for connecting branch circuits to cores of a live electrical cable, including branch terminal for achieving said method, with the charact-eristics pursuant to Clalms 1 and 3.
From the previously known German Patent No. DE-GM
1 855 753 there is already known a branch terminal for ground cable, which exhibits two semicircular-shaped insulation bodies into which are implanted, in their interiors, contact pieces with lugs having a conical or pyramid shape. The insulation parts are pressed together by means of a tension band, which extends in a circumferential groove of the insulation parts.
It is disadvantageous that the connection of the branch terminals is not possible at the individual contact pieces, separated from the insulation bodies, whereby because of the required bending and insertion of branch conductors into the openings of the contact pieces, the connection of the branch circuits becomes more difficult. In addition, the exertion of pressure upon the contact pieces and the pressing of the contact piece protrusions into the cable cores requires massive upper and lower partsl thus resulting in an unnecessary manufacturing cost. Finally, the pressing of the radial A 25 contact piece protrusions during the process of pressing together the two-part insulation body is not eEficient.
3~3 From the prepublication Version of German DE-PS
1 765 2~2 it is furthermore known that a branch terminal must be provided with a two-part clamping body whose parts are kept flexible with respect to each other and which can be pressed together by means of bolts. The clamping body parts accept the contact pieces firmly. They thus transmit to the contact pieces the pressure generated as a resuit of the screwing operation and press the blades of the contact pieces, which extend in the direction of the approaching clamp body parts, into the cable cores. It is also disadvantageous for this known branch terminal that the connection of the branch conductors is only possible at the con-tact pieces which are located within the clamp body, which makes the connection of the branch conductor more difficult.
Moreover, the clamp body in this instance, due to the transfer of pressure on the contact pieces, must also consist of compact parts which are expensive to produce.
The invention is ~ased on the objective of facilitating the connection of branch conductors to the contact pieces and simplifying the productiontmanufacture of the ciamp body.
The invention offers the advan-tage of making it possible to connect the branch conductors, e~en singly, to the spatially separated contact pieces of the branch terminal.
The installation process is thereby simplified considerably. Moreover, i-t is possible to use a relatively simple body for pressing together the cable cores and thus for compressing the contact blades or similar elements of the contact pieces into the cable cores.
The clamping ring, which exerts pressure only upon the cable cores, can be made from a metallic part, preferably a pressed metal ring, which is bent into a U-shaped element.
According to a broad aspect of the in~ention there is provided a method for electrically connecting at least one branch circuit to a li~e electrical cable having a plurality of cores, comprising spreading apart the plurality of cores of the cable to form an open area between the cores~ inserting 12g:~3~3~
contact means in the open area between the plurality of cores, connecting the at least one branch circuit to the contact means, encircling the plurality of cores and the contact means with clamping means, and tightening the clamping means to press the plurality of cores against the contact means thereby connecting the at least one branch circuit to at least one of the plurality of cores o~ the cable.
According to a further broad aspect of the invention there is provided an appara-tus for electrically connecting at least one branch circuit to an electrical cable having a plurality of cable cores, comprising at least one contact piece having a foot-shaped extension which is insertable between at least first and second cable cores-and with a branch circuit lead being connected to said at least one contact piece, and clamping means selectively clampable around the electrical cable and the at least one contact piece and includin~ means for bringing the at least one contact piece with the at least one branch circuit into electrical contact with the cable.
According to a stili further broad aspect of the invention there is provided a branch terminal for electrically connecting at least one branch circuit to an electrical cable having a plurality of cable cores wherein each core is surrounded by insulation, comprising a spacer body which spaces at least first and second cable cores apart from each other, at least one contact piece having a block-shaped contact piece body and a foot-shaped extension perpendicular thereto, said contact piece body including connecting means for connecting the at least one branch circuit to the contact piece and said extension including a knife blade contact portion, and a clamping ring having two generally semi-circular halves wherein the clamping ring is selectively clampable circumferentially of the pluraiity of cable cores ~ and around the contact piece and the spacer body, said '`~5 clamping ring including means for adjusting the relative spacing between said halves for urging the knife blade 3~;3 contact portion of the contact piece to cut through the insulation of at least one of the plurality o~ cable cores thereby electrically connecting the branch circuit with the electrical cable.
The invention is explained in greater detail by refer-ence to drawings in which:
Figure 1 illustrates a front view, partially sectioned, of the branch terminal according to the invention; and Figure 2 shows a side view.
As an example, the main cable 1 shows four cable cores
2. These preferably have the cross sectional shape of a circle segment. Each cable core 2 is surrounded by insulation 3. The external insulation sheathing which encases the main cable has already been removed.
The two uppermost cable cores 2, as shown in Figure 1, have been separated from the lower cable cores by inserting a spreader wedge or other spreader device, thus resulting in the separated position as illustrated. A spacer element 5, which traverses the main cable 1, is inserted into the slot 4 produced between the upper and lower cable cores. The spacer element 5, as evident from Figure 2, exhibits a dual trough-shaped profile, when viewed from-its cross-section. It is produced by squaring off a corresponding profile section.
From the rail 6 extend edges 7 on each side, sloping in an upward or downward direction toward the outside. The sloping edges 7, when placed under increased pressure on their sides, can deviate in the direction of the plane o~ rail 6, The contact pieces 8 for the four cable cores 2 are identically shaped. They ha~e a block-shaped contact piece body 9, which is joined by a one-piece contact foot 10 located at a right angle to the longitudinal axis of the contact piece body.
The free length of this foot is dimensioned so that it extends at least over a substantial portion of the cable core 2 when the contact pieces rest upon the cable core 2. The contact foot 10 has contact blades 11 or contact points, etc. The contact blades 11 extend in the longitudinal direction of the foot 10.
The two uppermost cable cores 2, as shown in Figure 1, have been separated from the lower cable cores by inserting a spreader wedge or other spreader device, thus resulting in the separated position as illustrated. A spacer element 5, which traverses the main cable 1, is inserted into the slot 4 produced between the upper and lower cable cores. The spacer element 5, as evident from Figure 2, exhibits a dual trough-shaped profile, when viewed from-its cross-section. It is produced by squaring off a corresponding profile section.
From the rail 6 extend edges 7 on each side, sloping in an upward or downward direction toward the outside. The sloping edges 7, when placed under increased pressure on their sides, can deviate in the direction of the plane o~ rail 6, The contact pieces 8 for the four cable cores 2 are identically shaped. They ha~e a block-shaped contact piece body 9, which is joined by a one-piece contact foot 10 located at a right angle to the longitudinal axis of the contact piece body.
The free length of this foot is dimensioned so that it extends at least over a substantial portion of the cable core 2 when the contact pieces rest upon the cable core 2. The contact foot 10 has contact blades 11 or contact points, etc. The contact blades 11 extend in the longitudinal direction of the foot 10.
3~3~
~5-The contact pieces 8 may be inserted with their feet into the space limited by spacer 5 and each respective cable core 2. The height of each contact foot 10 is preferably equal to the projection height of edges 7 of the spacer 5.
However, it may also be somewhat larger or smaller. If it is a little bit higher, the contact pieces 8 are inserted under pressure, inasmuch as contact blades 11 already penetrate to some extent the insulation 3 of each cable core.
Consequently, following insertion of the contact pieces, said contact pieces are secured against slipping out of position.
If all four contact pieces 8 have been properly inserted into the spacer piece 5, the lateral surfaces of contact piece body 9, which are facing the main cable 1, are in contact with the insulation 3 of the respective cable core 2.
Each contact piece body 9 has a crosswise connection hole 12 for a branch conductor, not illustrated, which is to be connected. At the center and along the longitudinal axis of the contact piece body 9 there is a clamp screw 13 for clamping down a branch conductor (not illustrated).
Each contact piece body 9 is surrounded by an insulating jacket 14. This jacket is designed so as to protrude above the head of clamping screw 13 with a closed cross~section and from that point extends to each outer surface of the contact piece 8 up to the lower extremity of con-tact piece body 9. This lower extremity of insulation jacket 14 projects inwardly and thus affords protection against unintentional removal of insulation jacket 14. The lateral surfaces of the contact piece 8 which face each other, along with a section of the lateral surface of contact piece 8 which faces core cable 2, are free.
The connection of the branch conductor to the contact pieces 8 is preferably achieved before the latter are inserted with their feetlO into the spacer piece located between the cable cores 2. However, it is also possible to make the con-nection of the branch conductors after the con~act pieces ~r~ have been inserted, when the latter have in essence been Z3~3 positioned in a common cross-section plane of main cable l.
In order to make physical contact between contact blades ll and cable cores 2, it is necessary for the cable cores 2 to be pressed under great pressure agains contact S blades ll.
To this end, a two-part clamping rihg 15 is preferably used. Clamping ring 15 consists preferably of two semi-circular parts 16. Each component l~ is shaped Like a "U" when viewed from its cross-section. In the apex area pressure pieces 17 with teeth or ~lades 18 are located next to one another and supported by means of an insulation element l9 against the U-rail 20, which passes through the apex area. Insulation elements 21, which encase the lateral walls of element, are designed for attachment of insulation element l9.
In the area of contact pieces 8, the "U" rails 20 are recessed so that the contact piece bodies 9 which insula-tion casing l~ can freely pass through.
The extremities of component 16 exhibit in the "U"
rails 20 holes for mounting of tension bolts 23 with nuts 24.
Upon positioning contact pieces 8 on the main cable l by inserting contact feet lO into the spacer piece 5, which extends crosswise through main cable l, and after connecting the branch conductors to contact pieces 8, the clamping ring 15 is positioned and, as a result of tightening the tension bolts 23 by means of the pressure pieces 17, pressure is exerted so that cable cores 2 are pressed against the blades ll of contact feet 10. The contact blades then penetrate the insulation 3 and make physical contact with the metal core of cable cores 2. Since connection of the branch conductors occurs before physical contact is established between contact pieces 8 and cable cores 2, no special tools are required for connecting the branch conductors, and since the live voltage-carrying components are completely and safely insulated/isolted from the metallic clamping ring 15, likewise j~$~ no special tools are needed for tightening the tension bolts 23.
Spacer element 5-may also take the shape of a wedge, which thus helps to spread apart the cabie cores 2 and which, 3~33 after insertion of the spacer element, projects above the main cable 1. This projecting piece of the wedge, which is no longer required, may be sawed or broken off ~if the necessary break groove is provided).
It is also possible to design contact piece 8 and spacer piece 5 in such a way that a~ter inserting contact piece foot 10 into the spacsr piece 5 contact piece 8 is locked into place. To this end, for example, it would be possible to design the top side of rail 6 and the bottom side of contact foot 10 with teeth. Thus it is possible to insert contact piece foot 10 into spacer piece 5, thereby preventing it from being removed.
Instead of a me-tallic clamping ring 15, it is also possible to utilize a clamping ring made from insulation material. In this instance, the metal pressure pieces 17 and the insulation elements or insu~ation jackets which surround and/or support contact pieces 8 can be eliminated.
~5-The contact pieces 8 may be inserted with their feet into the space limited by spacer 5 and each respective cable core 2. The height of each contact foot 10 is preferably equal to the projection height of edges 7 of the spacer 5.
However, it may also be somewhat larger or smaller. If it is a little bit higher, the contact pieces 8 are inserted under pressure, inasmuch as contact blades 11 already penetrate to some extent the insulation 3 of each cable core.
Consequently, following insertion of the contact pieces, said contact pieces are secured against slipping out of position.
If all four contact pieces 8 have been properly inserted into the spacer piece 5, the lateral surfaces of contact piece body 9, which are facing the main cable 1, are in contact with the insulation 3 of the respective cable core 2.
Each contact piece body 9 has a crosswise connection hole 12 for a branch conductor, not illustrated, which is to be connected. At the center and along the longitudinal axis of the contact piece body 9 there is a clamp screw 13 for clamping down a branch conductor (not illustrated).
Each contact piece body 9 is surrounded by an insulating jacket 14. This jacket is designed so as to protrude above the head of clamping screw 13 with a closed cross~section and from that point extends to each outer surface of the contact piece 8 up to the lower extremity of con-tact piece body 9. This lower extremity of insulation jacket 14 projects inwardly and thus affords protection against unintentional removal of insulation jacket 14. The lateral surfaces of the contact piece 8 which face each other, along with a section of the lateral surface of contact piece 8 which faces core cable 2, are free.
The connection of the branch conductor to the contact pieces 8 is preferably achieved before the latter are inserted with their feetlO into the spacer piece located between the cable cores 2. However, it is also possible to make the con-nection of the branch conductors after the con~act pieces ~r~ have been inserted, when the latter have in essence been Z3~3 positioned in a common cross-section plane of main cable l.
In order to make physical contact between contact blades ll and cable cores 2, it is necessary for the cable cores 2 to be pressed under great pressure agains contact S blades ll.
To this end, a two-part clamping rihg 15 is preferably used. Clamping ring 15 consists preferably of two semi-circular parts 16. Each component l~ is shaped Like a "U" when viewed from its cross-section. In the apex area pressure pieces 17 with teeth or ~lades 18 are located next to one another and supported by means of an insulation element l9 against the U-rail 20, which passes through the apex area. Insulation elements 21, which encase the lateral walls of element, are designed for attachment of insulation element l9.
In the area of contact pieces 8, the "U" rails 20 are recessed so that the contact piece bodies 9 which insula-tion casing l~ can freely pass through.
The extremities of component 16 exhibit in the "U"
rails 20 holes for mounting of tension bolts 23 with nuts 24.
Upon positioning contact pieces 8 on the main cable l by inserting contact feet lO into the spacer piece 5, which extends crosswise through main cable l, and after connecting the branch conductors to contact pieces 8, the clamping ring 15 is positioned and, as a result of tightening the tension bolts 23 by means of the pressure pieces 17, pressure is exerted so that cable cores 2 are pressed against the blades ll of contact feet 10. The contact blades then penetrate the insulation 3 and make physical contact with the metal core of cable cores 2. Since connection of the branch conductors occurs before physical contact is established between contact pieces 8 and cable cores 2, no special tools are required for connecting the branch conductors, and since the live voltage-carrying components are completely and safely insulated/isolted from the metallic clamping ring 15, likewise j~$~ no special tools are needed for tightening the tension bolts 23.
Spacer element 5-may also take the shape of a wedge, which thus helps to spread apart the cabie cores 2 and which, 3~33 after insertion of the spacer element, projects above the main cable 1. This projecting piece of the wedge, which is no longer required, may be sawed or broken off ~if the necessary break groove is provided).
It is also possible to design contact piece 8 and spacer piece 5 in such a way that a~ter inserting contact piece foot 10 into the spacsr piece 5 contact piece 8 is locked into place. To this end, for example, it would be possible to design the top side of rail 6 and the bottom side of contact foot 10 with teeth. Thus it is possible to insert contact piece foot 10 into spacer piece 5, thereby preventing it from being removed.
Instead of a me-tallic clamping ring 15, it is also possible to utilize a clamping ring made from insulation material. In this instance, the metal pressure pieces 17 and the insulation elements or insu~ation jackets which surround and/or support contact pieces 8 can be eliminated.
Claims (16)
1. A method for electrically connecting at least one branch circuit to a live electrical cable having a plurality of cores, comprising:
spreading apart the plurality of cores of the cable to form an open area between the cores;
inserting contact means in the open area between the plurality of cores;
connecting the at least one branch circuit to the contact means;
encircling the plurality of cores and the contact means with clamping means; and, tightening the clamping means to press the plurality of cores against the contact means thereby connecting the at least one branch circuit to at least one of the plurality of cores of the cable.
spreading apart the plurality of cores of the cable to form an open area between the cores;
inserting contact means in the open area between the plurality of cores;
connecting the at least one branch circuit to the contact means;
encircling the plurality of cores and the contact means with clamping means; and, tightening the clamping means to press the plurality of cores against the contact means thereby connecting the at least one branch circuit to at least one of the plurality of cores of the cable.
2. The method of claim 1 wherein the step of spreading includes placing a spacer element in the open area between the cores of keep them apart and wherein the contact means includes a plurality of contact pieces which are located in a planar open area between the plurality of cores during the step of inserting.
3. The method of claim 1 wherein during the step of tightening, a knife edge blade of the contact means progressively cuts through an insulation layer surrounding at least one of the plurality of cores of the cable, said tightening step continuing at least until the knife edge blade electrically connects the at least one branch circuit to the at least one core of the cable.
4. Apparatus for electrically connecting at least one branch circuit to an electrical cable having a plurality of cable cores, comprising:
at least one contact piece having a foot-shaped extension which is insertable between at least first and second cable cores and with a branch circuit lead being connected to said at least one contact piece; and, clamping means selectively clampable around the electrical cable and the at least one contact piece and including means for bringing the at least one contact piece with the at least one branch circuit into electrical contact with the cable.
at least one contact piece having a foot-shaped extension which is insertable between at least first and second cable cores and with a branch circuit lead being connected to said at least one contact piece; and, clamping means selectively clampable around the electrical cable and the at least one contact piece and including means for bringing the at least one contact piece with the at least one branch circuit into electrical contact with the cable.
5. The apparatus of claim 4 further including spacing means for spacing apart the first and second cable cores so that the contact piece can be inserted therebetween.
6. The apparatus of claim 5 wherein the spacing means includes a rail-shaped spacer element having a dual trough-shaped profile and longitudinal edges of a size approximately the same as the width of the foot-shaped extension of the contact piece.
7. The apparatus of claim 6 wherein the longitudinal edges of the spacer element extend obliquely outward.
8. The apparatus of claim 6 wherein the spacer element has a wedge-shaped front portion.
9. The apparatus of claim 6 wherein the spacer element cooperates with the contact piece such that in one position of the contact piece the spacer element is locked in place.
10. The apparatus of claim 4 wherein the foot-shaped extension of the contact piece has flat edge surfaces and wherein a contact blade for contacting a cable core is supported along a longitudinal edge of the foot-shaped extension.
11. The apparatus of claim 4 wherein the contact piece includes a clamping aperture in which a lead from the branch circuit is positioned, and clamping means for clamping the lead to the contact piece.
12. The apparatus of claim 4 wherein the clamping means includes a clamping ring having two semi-circular halves which are joined by fastening means, each said half having a generally U-shaped cross-section which receives an inter-nally insulated pressure piece and has recesses for the unrestricted passage of the at least one contact piece.
13. A branch terminal for electrically connecting at least one branch circuit to an electrical cable having a plurality of cable cores wherein each core is surrounded by insulation, comprising:
a spacer body which spaces at least first and second cable cores apart from each other;
at least one contact piece having a block-shaped contact piece body and a foot-shaped extension perpendicular thereto, said contact piece body including connecting means for connecting the at least one branch circuit to the contact piece and said extension including a knife blade contact portion; and, a clamping ring having two generally semi-circular halves wherein the clamping ring is selectively clampable circumferentially of the plurality of cable cores and around the contact piece and the spacer body, said clamping ring including means for adjusting the relative spacing between said halves for urging the knife blade contact portion of the contact piece to cut through the insulation of at least one of the plurality of cable cores thereby electrically connecting the branch circuit with the electrical cable.
a spacer body which spaces at least first and second cable cores apart from each other;
at least one contact piece having a block-shaped contact piece body and a foot-shaped extension perpendicular thereto, said contact piece body including connecting means for connecting the at least one branch circuit to the contact piece and said extension including a knife blade contact portion; and, a clamping ring having two generally semi-circular halves wherein the clamping ring is selectively clampable circumferentially of the plurality of cable cores and around the contact piece and the spacer body, said clamping ring including means for adjusting the relative spacing between said halves for urging the knife blade contact portion of the contact piece to cut through the insulation of at least one of the plurality of cable cores thereby electrically connecting the branch circuit with the electrical cable.
14. The branch terminal of claim 13 wherein the spacer body is rail shaped and has outwardly flaring longitudinal edge portions.
15. The branch terminal of claim 13 wherein the contact piece body of the contact piece is surrounded by an insulating jacket and the foot-shaped extension of the contact piece body is free of insulation.
16. The branch terminal of claim 13 wherein the connecting means of the contact piece includes an aperture in the contact piece body for receiving the branch circuit and a clamping means which can selectively clamp the leads of the branch circuit to electrically connect the branch circuit to the contact piece.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3221458A DE3221458C1 (en) | 1982-06-07 | 1982-06-07 | Process for connecting branch conductors to wires of a live electrical cable and branch clamp for carrying out this process |
| DEP3221458.8 | 1982-06-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1202393A true CA1202393A (en) | 1986-03-25 |
Family
ID=6165544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000429727A Expired CA1202393A (en) | 1982-06-07 | 1983-06-06 | Method for connecting branch circuits to cores of a live electrical cable, including branch terminal for achieving said method |
Country Status (20)
| Country | Link |
|---|---|
| US (1) | US4527854A (en) |
| AT (1) | AT384124B (en) |
| AU (1) | AU551945B2 (en) |
| BR (1) | BR8302977A (en) |
| CA (1) | CA1202393A (en) |
| CH (1) | CH661617A5 (en) |
| DE (1) | DE3221458C1 (en) |
| DK (1) | DK259883A (en) |
| ES (1) | ES8406804A1 (en) |
| FI (1) | FI72011C (en) |
| FR (1) | FR2528249B1 (en) |
| GB (1) | GB2121621B (en) |
| IE (1) | IE54479B1 (en) |
| IT (1) | IT1170380B (en) |
| MX (1) | MX152939A (en) |
| NL (1) | NL184345C (en) |
| NO (1) | NO159688C (en) |
| NZ (1) | NZ204296A (en) |
| SE (1) | SE8303159L (en) |
| ZA (1) | ZA833996B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19539184C3 (en) * | 1995-10-20 | 2002-12-12 | Gerhard Petri Gmbh & Co Kg | Contact element for generating an electrical contact between the main conductor and branch conductor, and a connecting terminal with this contact element |
| FR2811481B1 (en) * | 2000-07-10 | 2002-12-27 | Cahors App Elec | ELECTRICAL CONNECTION AND DISTRIBUTION DEVICE |
| FR2956779B1 (en) | 2010-02-24 | 2012-04-20 | Tyco Electronics Simel | SIMPLIFIED MOUNT DERIVATION CONNECTOR |
| FR2956778B1 (en) | 2010-02-24 | 2012-04-27 | Tyco Electronics Simel | OPTIMIZED CONTACT DERIVATION CONNECTOR FOR CONNECTING ELEMENTS |
| GB201102405D0 (en) * | 2011-02-11 | 2011-03-30 | Sicame Electrical Dev Ltd | Connector of electrical conductors |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE179050C (en) * | 1905-03-01 | |||
| GB727111A (en) * | 1952-06-11 | 1955-03-30 | Rotterdam Gemeente | Improvements in or relating to electric cable branch terminals |
| DE1855753U (en) * | 1959-07-14 | 1962-08-02 | Adrian Hendrik Piet Regoort N | BRANCH TERMINAL FOR GROUND CABLE. |
| DE1765242B1 (en) * | 1968-04-23 | 1971-01-28 | Pfisterer Elektrotech Karl | Branch terminal |
| GB1240484A (en) * | 1968-05-28 | 1971-07-28 | Alcan Res And Dev Ltd Formerly | Improvements in or relating to electrical connectors |
| DE1816810C3 (en) * | 1968-12-24 | 1973-11-08 | Schiffmann, Alois, Dipl.-Kfm., 8000 Muenchen | Cable sleeve |
| DE2034976B2 (en) * | 1970-07-15 | 1972-05-18 | Karl Pfisterer Fabrik elektrotechnischer Spezial artikel, 7000 Stuttgart | BRANCH TERMINAL |
| DE2143219C3 (en) * | 1971-08-28 | 1974-01-10 | Karl Pfisterer, Fabrik Elektrotechnischer Spezialartikel, 7000 Stuttgart | Branch terminal |
| GB1438103A (en) * | 1972-08-04 | 1976-06-03 | Pirelli General Cable Works | |
| CH558597A (en) * | 1973-01-04 | 1975-01-31 | Pfisterer Elektrotech Karl | BRANCH TERMINAL. |
| BE810230A (en) * | 1974-01-28 | 1974-05-16 | BYPASS TERMINAL FOR INSULATED CABLE. | |
| DE7816996U1 (en) * | 1978-06-07 | 1978-09-28 | Felten & Guilleaume Carlswerk Ag, 5000 Koeln | Wedge branch terminal for multi-phase low voltage cables |
| NL7905180A (en) * | 1979-07-03 | 1981-01-06 | Electriciteits Mij Ijsselcentr | CABLE SLEEVE. |
-
1982
- 1982-06-07 DE DE3221458A patent/DE3221458C1/en not_active Expired
-
1983
- 1983-05-19 NZ NZ204296A patent/NZ204296A/en unknown
- 1983-05-25 AT AT0191383A patent/AT384124B/en not_active IP Right Cessation
- 1983-06-01 IT IT48406/83A patent/IT1170380B/en active
- 1983-06-02 ZA ZA833996A patent/ZA833996B/en unknown
- 1983-06-03 AU AU15358/83A patent/AU551945B2/en not_active Ceased
- 1983-06-03 SE SE8303159A patent/SE8303159L/en not_active Application Discontinuation
- 1983-06-06 NO NO832047A patent/NO159688C/en unknown
- 1983-06-06 BR BR8302977A patent/BR8302977A/en unknown
- 1983-06-06 CH CH3098/83A patent/CH661617A5/en not_active IP Right Cessation
- 1983-06-06 FI FI832028A patent/FI72011C/en not_active IP Right Cessation
- 1983-06-06 CA CA000429727A patent/CA1202393A/en not_active Expired
- 1983-06-06 NL NLAANVRAGE8301998,A patent/NL184345C/en not_active IP Right Cessation
- 1983-06-06 FR FR8309348A patent/FR2528249B1/en not_active Expired
- 1983-06-07 GB GB08315590A patent/GB2121621B/en not_active Expired
- 1983-06-07 IE IE1342/83A patent/IE54479B1/en not_active IP Right Cessation
- 1983-06-07 DK DK259883A patent/DK259883A/en not_active Application Discontinuation
- 1983-06-07 MX MX197556A patent/MX152939A/en unknown
- 1983-06-07 US US06/501,768 patent/US4527854A/en not_active Expired - Fee Related
- 1983-06-07 ES ES523062A patent/ES8406804A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NO159688B (en) | 1988-10-17 |
| IE54479B1 (en) | 1989-10-25 |
| ES523062A0 (en) | 1984-08-01 |
| SE8303159L (en) | 1983-12-08 |
| BR8302977A (en) | 1984-02-07 |
| NL8301998A (en) | 1984-01-02 |
| NO159688C (en) | 1989-01-25 |
| SE8303159D0 (en) | 1983-06-03 |
| MX152939A (en) | 1986-07-03 |
| NO832047L (en) | 1983-12-08 |
| AU1535883A (en) | 1983-12-15 |
| DK259883A (en) | 1983-12-08 |
| IT1170380B (en) | 1987-06-03 |
| CH661617A5 (en) | 1987-07-31 |
| IE831342L (en) | 1983-12-07 |
| FI72011C (en) | 1987-03-09 |
| FR2528249A1 (en) | 1983-12-09 |
| US4527854A (en) | 1985-07-09 |
| FI832028L (en) | 1983-12-08 |
| FR2528249B1 (en) | 1986-02-07 |
| GB8315590D0 (en) | 1983-07-13 |
| AT384124B (en) | 1987-10-12 |
| ATA191383A (en) | 1987-02-15 |
| NL184345C (en) | 1989-06-16 |
| FI832028A0 (en) | 1983-06-06 |
| IT8348406A0 (en) | 1983-06-01 |
| GB2121621B (en) | 1986-04-23 |
| DE3221458C1 (en) | 1987-12-23 |
| GB2121621A (en) | 1983-12-21 |
| AU551945B2 (en) | 1986-05-15 |
| FI72011B (en) | 1986-11-28 |
| ZA833996B (en) | 1984-02-29 |
| NZ204296A (en) | 1986-06-11 |
| DK259883D0 (en) | 1983-06-07 |
| ES8406804A1 (en) | 1984-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4449777A (en) | Drop wire connector | |
| EP0698943B1 (en) | Flat/round cable connecting device | |
| US3824528A (en) | Connector for coaxial cable | |
| ES2036478A2 (en) | Electrical interconnection assembly, process of and apparatus for manufacturing the same and wire laying jig therefor | |
| CN100429828C (en) | Feed through and common ground for electrical cables | |
| US3622687A (en) | Multiconductor composite belt and method of fabricating it | |
| US3676836A (en) | Universal sheath bond for communications cable | |
| CA1202393A (en) | Method for connecting branch circuits to cores of a live electrical cable, including branch terminal for achieving said method | |
| US3960425A (en) | Harness cable connector | |
| DE69021922D1 (en) | Electrical connector system and end contacts provided for this purpose, which penetrate the insulation. | |
| CA1104675A (en) | Flexible electrical jumper and method of making same | |
| EP0613214B1 (en) | Terminal table for electrical equipment and power converting device employing the same | |
| US4339167A (en) | Flat conductor to round conductor connection system | |
| IT8241565A0 (en) | COMBINED MACHINE FOR THE PROGRAMMED CUTTING OF INSULATED AND NON-INSULATED ELECTRICAL WIRE, STRIPPING OF THE HEADS, INSERTION AND CLAMPING OF TERMINALS AND INSULATING PROTECTIONS. | |
| EP0021550A1 (en) | Cable jointbox | |
| US4410232A (en) | Terminal staking article and process | |
| WO1998045908A3 (en) | Electrical distributor with a common conductor | |
| US4068914A (en) | Connector device for telephone terminals or housings | |
| GB2173361A (en) | An improved electric plug assembly | |
| EP1063736B1 (en) | Electrical connector and method of soldering cable to such a connector | |
| US3256509A (en) | Connector for joining wire to foils | |
| KR101966786B1 (en) | Joint conductor connecting sleeve of integral structure for ultra high voltage power cable | |
| FI66266C (en) | FOERHINDRINGSANORDNING FOER LJUSBAOGESKADOR I ISOLERADE FRILUFTSLEDNINGAR. | |
| KR960004822Y1 (en) | Slotted sleeve | |
| US2795681A (en) | Electrical heating unit and method of making same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |